21311940

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{307}}^1$

素因数の和:421

約数の個数: 96

約数和(自身を含む): 65197440

約数和(自身を除く): 43885500

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 89, 130, 156, 178, 195, 260, 267, 307, 356, 390, 445, 534, 614, 780, 890, 921, 1068, 1157, 1228, 1335, 1535, 1780, 1842, 2314, 2670, 3070, 3471, 3684, 3991, 4605, 4628, 5340, 5785, 6140, 6942, 7982, 9210, 11570, 11973, 13884, 15964, 17355, 18420, 19955, 23140, 23946, 27323, 34710, 39910, 47892, 54646, 59865, 69420, 79820, 81969, 109292, 119730, 136615, 163938, 239460, 273230, 327876, 355199, 409845, 546460, 710398, 819690, 1065597, 1420796, 1639380, 1775995, 2131194, 3551990, 4262388, 5327985, 7103980, 10655970, 21311940]

約数ペア:

[(1, 21311940), (2, 10655970), (3, 7103980), (4, 5327985), (5, 4262388), (6, 3551990), (10, 2131194), (12, 1775995), (13, 1639380), (15, 1420796), (20, 1065597), (26, 819690), (30, 710398), (39, 546460), (52, 409845), (60, 355199), (65, 327876), (78, 273230), (89, 239460), (130, 163938), (156, 136615), (178, 119730), (195, 109292), (260, 81969), (267, 79820), (307, 69420), (356, 59865), (390, 54646), (445, 47892), (534, 39910), (614, 34710), (780, 27323), (890, 23946), (921, 23140), (1068, 19955), (1157, 18420), (1228, 17355), (1335, 15964), (1535, 13884), (1780, 11973), (1842, 11570), (2314, 9210), (2670, 7982), (3070, 6942), (3471, 6140), (3684, 5785), (3991, 5340), (4605, 4628)]