21000865890

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{7213}}^1$

素因数の和:7364

約数の個数: 128

約数和(自身を含む): 53843910912

約数和(自身を除く): 32843045022

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 37, 43, 61, 74, 86, 111, 122, 129, 183, 185, 215, 222, 258, 305, 366, 370, 430, 555, 610, 645, 915, 1110, 1290, 1591, 1830, 2257, 2623, 3182, 4514, 4773, 5246, 6771, 7213, 7869, 7955, 9546, 11285, 13115, 13542, 14426, 15738, 15910, 21639, 22570, 23865, 26230, 33855, 36065, 39345, 43278, 47730, 67710, 72130, 78690, 97051, 108195, 194102, 216390, 266881, 291153, 310159, 439993, 485255, 533762, 582306, 620318, 800643, 879986, 930477, 970510, 1319979, 1334405, 1455765, 1550795, 1601286, 1860954, 2199965, 2639958, 2668810, 2911530, 3101590, 4003215, 4399930, 4652385, 6599895, 8006430, 9304770, 11475883, 13199790, 16279741, 18919699, 22951766, 32559482, 34427649, 37839398, 48839223, 56759097, 57379415, 68855298, 81398705, 94598495, 97678446, 113518194, 114758830, 162797410, 172138245, 189196990, 244196115, 283795485, 344276490, 488392230, 567590970, 700028863, 1400057726, 2100086589, 3500144315, 4200173178, 7000288630, 10500432945, 21000865890]

約数ペア:

[(1, 21000865890), (2, 10500432945), (3, 7000288630), (5, 4200173178), (6, 3500144315), (10, 2100086589), (15, 1400057726), (30, 700028863), (37, 567590970), (43, 488392230), (61, 344276490), (74, 283795485), (86, 244196115), (111, 189196990), (122, 172138245), (129, 162797410), (183, 114758830), (185, 113518194), (215, 97678446), (222, 94598495), (258, 81398705), (305, 68855298), (366, 57379415), (370, 56759097), (430, 48839223), (555, 37839398), (610, 34427649), (645, 32559482), (915, 22951766), (1110, 18919699), (1290, 16279741), (1591, 13199790), (1830, 11475883), (2257, 9304770), (2623, 8006430), (3182, 6599895), (4514, 4652385), (4773, 4399930), (5246, 4003215), (6771, 3101590), (7213, 2911530), (7869, 2668810), (7955, 2639958), (9546, 2199965), (11285, 1860954), (13115, 1601286), (13542, 1550795), (14426, 1455765), (15738, 1334405), (15910, 1319979), (21639, 970510), (22570, 930477), (23865, 879986), (26230, 800643), (33855, 620318), (36065, 582306), (39345, 533762), (43278, 485255), (47730, 439993), (67710, 310159), (72130, 291153), (78690, 266881), (97051, 216390), (108195, 194102)]