20993640

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{251}}^1$

素因数の和:323

約数の個数: 128

約数和(自身を含む): 68584320

約数和(自身を除く): 47590680

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 17, 20, 24, 30, 34, 40, 41, 51, 60, 68, 82, 85, 102, 120, 123, 136, 164, 170, 204, 205, 246, 251, 255, 328, 340, 408, 410, 492, 502, 510, 615, 680, 697, 753, 820, 984, 1004, 1020, 1230, 1255, 1394, 1506, 1640, 2008, 2040, 2091, 2460, 2510, 2788, 3012, 3485, 3765, 4182, 4267, 4920, 5020, 5576, 6024, 6970, 7530, 8364, 8534, 10040, 10291, 10455, 12801, 13940, 15060, 16728, 17068, 20582, 20910, 21335, 25602, 27880, 30120, 30873, 34136, 41164, 41820, 42670, 51204, 51455, 61746, 64005, 82328, 83640, 85340, 102408, 102910, 123492, 128010, 154365, 170680, 174947, 205820, 246984, 256020, 308730, 349894, 411640, 512040, 524841, 617460, 699788, 874735, 1049682, 1234920, 1399576, 1749470, 2099364, 2624205, 3498940, 4198728, 5248410, 6997880, 10496820, 20993640]

約数ペア:

[(1, 20993640), (2, 10496820), (3, 6997880), (4, 5248410), (5, 4198728), (6, 3498940), (8, 2624205), (10, 2099364), (12, 1749470), (15, 1399576), (17, 1234920), (20, 1049682), (24, 874735), (30, 699788), (34, 617460), (40, 524841), (41, 512040), (51, 411640), (60, 349894), (68, 308730), (82, 256020), (85, 246984), (102, 205820), (120, 174947), (123, 170680), (136, 154365), (164, 128010), (170, 123492), (204, 102910), (205, 102408), (246, 85340), (251, 83640), (255, 82328), (328, 64005), (340, 61746), (408, 51455), (410, 51204), (492, 42670), (502, 41820), (510, 41164), (615, 34136), (680, 30873), (697, 30120), (753, 27880), (820, 25602), (984, 21335), (1004, 20910), (1020, 20582), (1230, 17068), (1255, 16728), (1394, 15060), (1506, 13940), (1640, 12801), (2008, 10455), (2040, 10291), (2091, 10040), (2460, 8534), (2510, 8364), (2788, 7530), (3012, 6970), (3485, 6024), (3765, 5576), (4182, 5020), (4267, 4920)]