21209220

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{109}}^1$

素因数の和:194

約数の個数: 144

約数和(自身を含む): 69189120

約数和(自身を除く): 47979900

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 23, 30, 36, 45, 46, 47, 60, 69, 90, 92, 94, 109, 115, 138, 141, 180, 188, 207, 218, 230, 235, 276, 282, 327, 345, 414, 423, 436, 460, 470, 545, 564, 654, 690, 705, 828, 846, 940, 981, 1035, 1081, 1090, 1308, 1380, 1410, 1635, 1692, 1962, 2070, 2115, 2162, 2180, 2507, 2820, 3243, 3270, 3924, 4140, 4230, 4324, 4905, 5014, 5123, 5405, 6486, 6540, 7521, 8460, 9729, 9810, 10028, 10246, 10810, 12535, 12972, 15042, 15369, 16215, 19458, 19620, 20492, 21620, 22563, 25070, 25615, 30084, 30738, 32430, 37605, 38916, 45126, 46107, 48645, 50140, 51230, 61476, 64860, 75210, 76845, 90252, 92214, 97290, 102460, 112815, 117829, 150420, 153690, 184428, 194580, 225630, 230535, 235658, 307380, 353487, 451260, 461070, 471316, 589145, 706974, 922140, 1060461, 1178290, 1413948, 1767435, 2120922, 2356580, 3534870, 4241844, 5302305, 7069740, 10604610, 21209220]

約数ペア:

[(1, 21209220), (2, 10604610), (3, 7069740), (4, 5302305), (5, 4241844), (6, 3534870), (9, 2356580), (10, 2120922), (12, 1767435), (15, 1413948), (18, 1178290), (20, 1060461), (23, 922140), (30, 706974), (36, 589145), (45, 471316), (46, 461070), (47, 451260), (60, 353487), (69, 307380), (90, 235658), (92, 230535), (94, 225630), (109, 194580), (115, 184428), (138, 153690), (141, 150420), (180, 117829), (188, 112815), (207, 102460), (218, 97290), (230, 92214), (235, 90252), (276, 76845), (282, 75210), (327, 64860), (345, 61476), (414, 51230), (423, 50140), (436, 48645), (460, 46107), (470, 45126), (545, 38916), (564, 37605), (654, 32430), (690, 30738), (705, 30084), (828, 25615), (846, 25070), (940, 22563), (981, 21620), (1035, 20492), (1081, 19620), (1090, 19458), (1308, 16215), (1380, 15369), (1410, 15042), (1635, 12972), (1692, 12535), (1962, 10810), (2070, 10246), (2115, 10028), (2162, 9810), (2180, 9729), (2507, 8460), (2820, 7521), (3243, 6540), (3270, 6486), (3924, 5405), (4140, 5123), (4230, 5014), (4324, 4905)]