21383960

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{59}}^1$

素因数の和:141

約数の個数: 128

約数和(自身を含む): 57153600

約数和(自身を除く): 35769640

約数列:

[1, 2, 4, 5, 8, 10, 13, 17, 20, 26, 34, 40, 41, 52, 59, 65, 68, 82, 85, 104, 118, 130, 136, 164, 170, 205, 221, 236, 260, 295, 328, 340, 410, 442, 472, 520, 533, 590, 680, 697, 767, 820, 884, 1003, 1066, 1105, 1180, 1394, 1534, 1640, 1768, 2006, 2132, 2210, 2360, 2419, 2665, 2788, 3068, 3485, 3835, 4012, 4264, 4420, 4838, 5015, 5330, 5576, 6136, 6970, 7670, 8024, 8840, 9061, 9676, 10030, 10660, 12095, 13039, 13940, 15340, 18122, 19352, 20060, 21320, 24190, 26078, 27880, 30680, 31447, 36244, 40120, 41123, 45305, 48380, 52156, 62894, 65195, 72488, 82246, 90610, 96760, 104312, 125788, 130390, 157235, 164492, 181220, 205615, 251576, 260780, 314470, 328984, 362440, 411230, 521560, 534599, 628940, 822460, 1069198, 1257880, 1644920, 2138396, 2672995, 4276792, 5345990, 10691980, 21383960]

約数ペア:

[(1, 21383960), (2, 10691980), (4, 5345990), (5, 4276792), (8, 2672995), (10, 2138396), (13, 1644920), (17, 1257880), (20, 1069198), (26, 822460), (34, 628940), (40, 534599), (41, 521560), (52, 411230), (59, 362440), (65, 328984), (68, 314470), (82, 260780), (85, 251576), (104, 205615), (118, 181220), (130, 164492), (136, 157235), (164, 130390), (170, 125788), (205, 104312), (221, 96760), (236, 90610), (260, 82246), (295, 72488), (328, 65195), (340, 62894), (410, 52156), (442, 48380), (472, 45305), (520, 41123), (533, 40120), (590, 36244), (680, 31447), (697, 30680), (767, 27880), (820, 26078), (884, 24190), (1003, 21320), (1066, 20060), (1105, 19352), (1180, 18122), (1394, 15340), (1534, 13940), (1640, 13039), (1768, 12095), (2006, 10660), (2132, 10030), (2210, 9676), (2360, 9061), (2419, 8840), (2665, 8024), (2788, 7670), (3068, 6970), (3485, 6136), (3835, 5576), (4012, 5330), (4264, 5015), (4420, 4838)]