21997320

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{263}}^1$

素因数の和:335

約数の個数: 128

約数和(自身を含む): 71850240

約数和(自身を除く): 49852920

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 17, 20, 24, 30, 34, 40, 41, 51, 60, 68, 82, 85, 102, 120, 123, 136, 164, 170, 204, 205, 246, 255, 263, 328, 340, 408, 410, 492, 510, 526, 615, 680, 697, 789, 820, 984, 1020, 1052, 1230, 1315, 1394, 1578, 1640, 2040, 2091, 2104, 2460, 2630, 2788, 3156, 3485, 3945, 4182, 4471, 4920, 5260, 5576, 6312, 6970, 7890, 8364, 8942, 10455, 10520, 10783, 13413, 13940, 15780, 16728, 17884, 20910, 21566, 22355, 26826, 27880, 31560, 32349, 35768, 41820, 43132, 44710, 53652, 53915, 64698, 67065, 83640, 86264, 89420, 107304, 107830, 129396, 134130, 161745, 178840, 183311, 215660, 258792, 268260, 323490, 366622, 431320, 536520, 549933, 646980, 733244, 916555, 1099866, 1293960, 1466488, 1833110, 2199732, 2749665, 3666220, 4399464, 5499330, 7332440, 10998660, 21997320]

約数ペア:

[(1, 21997320), (2, 10998660), (3, 7332440), (4, 5499330), (5, 4399464), (6, 3666220), (8, 2749665), (10, 2199732), (12, 1833110), (15, 1466488), (17, 1293960), (20, 1099866), (24, 916555), (30, 733244), (34, 646980), (40, 549933), (41, 536520), (51, 431320), (60, 366622), (68, 323490), (82, 268260), (85, 258792), (102, 215660), (120, 183311), (123, 178840), (136, 161745), (164, 134130), (170, 129396), (204, 107830), (205, 107304), (246, 89420), (255, 86264), (263, 83640), (328, 67065), (340, 64698), (408, 53915), (410, 53652), (492, 44710), (510, 43132), (526, 41820), (615, 35768), (680, 32349), (697, 31560), (789, 27880), (820, 26826), (984, 22355), (1020, 21566), (1052, 20910), (1230, 17884), (1315, 16728), (1394, 15780), (1578, 13940), (1640, 13413), (2040, 10783), (2091, 10520), (2104, 10455), (2460, 8942), (2630, 8364), (2788, 7890), (3156, 6970), (3485, 6312), (3945, 5576), (4182, 5260), (4471, 4920)]