21308820

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1607}}^1$

素因数の和:1649

約数の個数: 96

約数和(自身を含む): 68076288

約数和(自身を除く): 46767468

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 17, 20, 26, 30, 34, 39, 51, 52, 60, 65, 68, 78, 85, 102, 130, 156, 170, 195, 204, 221, 255, 260, 340, 390, 442, 510, 663, 780, 884, 1020, 1105, 1326, 1607, 2210, 2652, 3214, 3315, 4420, 4821, 6428, 6630, 8035, 9642, 13260, 16070, 19284, 20891, 24105, 27319, 32140, 41782, 48210, 54638, 62673, 81957, 83564, 96420, 104455, 109276, 125346, 136595, 163914, 208910, 250692, 273190, 313365, 327828, 355147, 409785, 417820, 546380, 626730, 710294, 819570, 1065441, 1253460, 1420588, 1639140, 1775735, 2130882, 3551470, 4261764, 5327205, 7102940, 10654410, 21308820]

約数ペア:

[(1, 21308820), (2, 10654410), (3, 7102940), (4, 5327205), (5, 4261764), (6, 3551470), (10, 2130882), (12, 1775735), (13, 1639140), (15, 1420588), (17, 1253460), (20, 1065441), (26, 819570), (30, 710294), (34, 626730), (39, 546380), (51, 417820), (52, 409785), (60, 355147), (65, 327828), (68, 313365), (78, 273190), (85, 250692), (102, 208910), (130, 163914), (156, 136595), (170, 125346), (195, 109276), (204, 104455), (221, 96420), (255, 83564), (260, 81957), (340, 62673), (390, 54638), (442, 48210), (510, 41782), (663, 32140), (780, 27319), (884, 24105), (1020, 20891), (1105, 19284), (1326, 16070), (1607, 13260), (2210, 9642), (2652, 8035), (3214, 6630), (3315, 6428), (4420, 4821)]