21200280

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{139}}^1$

素因数の和:225

約数の個数: 128

約数和(自身を含む): 67737600

約数和(自身を除く): 46537320

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 31, 40, 41, 60, 62, 82, 93, 120, 123, 124, 139, 155, 164, 186, 205, 246, 248, 278, 310, 328, 372, 410, 417, 465, 492, 556, 615, 620, 695, 744, 820, 834, 930, 984, 1112, 1230, 1240, 1271, 1390, 1640, 1668, 1860, 2085, 2460, 2542, 2780, 3336, 3720, 3813, 4170, 4309, 4920, 5084, 5560, 5699, 6355, 7626, 8340, 8618, 10168, 11398, 12710, 12927, 15252, 16680, 17097, 17236, 19065, 21545, 22796, 25420, 25854, 28495, 30504, 34194, 34472, 38130, 43090, 45592, 50840, 51708, 56990, 64635, 68388, 76260, 85485, 86180, 103416, 113980, 129270, 136776, 152520, 170970, 172360, 176669, 227960, 258540, 341940, 353338, 517080, 530007, 683880, 706676, 883345, 1060014, 1413352, 1766690, 2120028, 2650035, 3533380, 4240056, 5300070, 7066760, 10600140, 21200280]

約数ペア:

[(1, 21200280), (2, 10600140), (3, 7066760), (4, 5300070), (5, 4240056), (6, 3533380), (8, 2650035), (10, 2120028), (12, 1766690), (15, 1413352), (20, 1060014), (24, 883345), (30, 706676), (31, 683880), (40, 530007), (41, 517080), (60, 353338), (62, 341940), (82, 258540), (93, 227960), (120, 176669), (123, 172360), (124, 170970), (139, 152520), (155, 136776), (164, 129270), (186, 113980), (205, 103416), (246, 86180), (248, 85485), (278, 76260), (310, 68388), (328, 64635), (372, 56990), (410, 51708), (417, 50840), (465, 45592), (492, 43090), (556, 38130), (615, 34472), (620, 34194), (695, 30504), (744, 28495), (820, 25854), (834, 25420), (930, 22796), (984, 21545), (1112, 19065), (1230, 17236), (1240, 17097), (1271, 16680), (1390, 15252), (1640, 12927), (1668, 12710), (1860, 11398), (2085, 10168), (2460, 8618), (2542, 8340), (2780, 7626), (3336, 6355), (3720, 5699), (3813, 5560), (4170, 5084), (4309, 4920)]