21304920

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{1951}}^1$

素因数の和:1985

約数の個数: 128

約数和(自身を含む): 78704640

約数和(自身を除く): 57399720

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 13, 14, 15, 20, 21, 24, 26, 28, 30, 35, 39, 40, 42, 52, 56, 60, 65, 70, 78, 84, 91, 104, 105, 120, 130, 140, 156, 168, 182, 195, 210, 260, 273, 280, 312, 364, 390, 420, 455, 520, 546, 728, 780, 840, 910, 1092, 1365, 1560, 1820, 1951, 2184, 2730, 3640, 3902, 5460, 5853, 7804, 9755, 10920, 11706, 13657, 15608, 19510, 23412, 25363, 27314, 29265, 39020, 40971, 46824, 50726, 54628, 58530, 68285, 76089, 78040, 81942, 101452, 109256, 117060, 126815, 136570, 152178, 163884, 177541, 202904, 204855, 234120, 253630, 273140, 304356, 327768, 355082, 380445, 409710, 507260, 532623, 546280, 608712, 710164, 760890, 819420, 887705, 1014520, 1065246, 1420328, 1521780, 1638840, 1775410, 2130492, 2663115, 3043560, 3550820, 4260984, 5326230, 7101640, 10652460, 21304920]

約数ペア:

[(1, 21304920), (2, 10652460), (3, 7101640), (4, 5326230), (5, 4260984), (6, 3550820), (7, 3043560), (8, 2663115), (10, 2130492), (12, 1775410), (13, 1638840), (14, 1521780), (15, 1420328), (20, 1065246), (21, 1014520), (24, 887705), (26, 819420), (28, 760890), (30, 710164), (35, 608712), (39, 546280), (40, 532623), (42, 507260), (52, 409710), (56, 380445), (60, 355082), (65, 327768), (70, 304356), (78, 273140), (84, 253630), (91, 234120), (104, 204855), (105, 202904), (120, 177541), (130, 163884), (140, 152178), (156, 136570), (168, 126815), (182, 117060), (195, 109256), (210, 101452), (260, 81942), (273, 78040), (280, 76089), (312, 68285), (364, 58530), (390, 54628), (420, 50726), (455, 46824), (520, 40971), (546, 39020), (728, 29265), (780, 27314), (840, 25363), (910, 23412), (1092, 19510), (1365, 15608), (1560, 13657), (1820, 11706), (1951, 10920), (2184, 9755), (2730, 7804), (3640, 5853), (3902, 5460)]