21965160

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{331}}^1$

素因数の和:431

約数の個数: 128

約数和(自身を含む): 76492800

約数和(自身を除く): 54527640

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 79, 84, 105, 120, 140, 158, 168, 210, 237, 280, 316, 331, 395, 420, 474, 553, 632, 662, 790, 840, 948, 993, 1106, 1185, 1324, 1580, 1655, 1659, 1896, 1986, 2212, 2317, 2370, 2648, 2765, 3160, 3310, 3318, 3972, 4424, 4634, 4740, 4965, 5530, 6620, 6636, 6951, 7944, 8295, 9268, 9480, 9930, 11060, 11585, 13240, 13272, 13902, 16590, 18536, 19860, 22120, 23170, 26149, 27804, 33180, 34755, 39720, 46340, 52298, 55608, 66360, 69510, 78447, 92680, 104596, 130745, 139020, 156894, 183043, 209192, 261490, 278040, 313788, 366086, 392235, 522980, 549129, 627576, 732172, 784470, 915215, 1045960, 1098258, 1464344, 1568940, 1830430, 2196516, 2745645, 3137880, 3660860, 4393032, 5491290, 7321720, 10982580, 21965160]

約数ペア:

[(1, 21965160), (2, 10982580), (3, 7321720), (4, 5491290), (5, 4393032), (6, 3660860), (7, 3137880), (8, 2745645), (10, 2196516), (12, 1830430), (14, 1568940), (15, 1464344), (20, 1098258), (21, 1045960), (24, 915215), (28, 784470), (30, 732172), (35, 627576), (40, 549129), (42, 522980), (56, 392235), (60, 366086), (70, 313788), (79, 278040), (84, 261490), (105, 209192), (120, 183043), (140, 156894), (158, 139020), (168, 130745), (210, 104596), (237, 92680), (280, 78447), (316, 69510), (331, 66360), (395, 55608), (420, 52298), (474, 46340), (553, 39720), (632, 34755), (662, 33180), (790, 27804), (840, 26149), (948, 23170), (993, 22120), (1106, 19860), (1185, 18536), (1324, 16590), (1580, 13902), (1655, 13272), (1659, 13240), (1896, 11585), (1986, 11060), (2212, 9930), (2317, 9480), (2370, 9268), (2648, 8295), (2765, 7944), (3160, 6951), (3310, 6636), (3318, 6620), (3972, 5530), (4424, 4965), (4634, 4740)]