81313540

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{397}}^1$

素因数の和:450

約数の個数: 144

約数和(自身を含む): 228674880

約数和(自身を除く): 147361340

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 19, 20, 22, 28, 35, 38, 44, 49, 55, 70, 76, 77, 95, 98, 110, 133, 140, 154, 190, 196, 209, 220, 245, 266, 308, 380, 385, 397, 418, 490, 532, 539, 665, 770, 794, 836, 931, 980, 1045, 1078, 1330, 1463, 1540, 1588, 1862, 1985, 2090, 2156, 2660, 2695, 2779, 2926, 3724, 3970, 4180, 4367, 4655, 5390, 5558, 5852, 7315, 7543, 7940, 8734, 9310, 10241, 10780, 11116, 13895, 14630, 15086, 17468, 18620, 19453, 20482, 21835, 27790, 29260, 30172, 30569, 37715, 38906, 40964, 43670, 51205, 52801, 55580, 61138, 75430, 77812, 82973, 87340, 97265, 102410, 105602, 122276, 150860, 152845, 165946, 194530, 204820, 211204, 213983, 264005, 305690, 331892, 369607, 389060, 414865, 427966, 528010, 580811, 611380, 739214, 829730, 855932, 1056020, 1069915, 1161622, 1478428, 1659460, 1848035, 2139830, 2323244, 2904055, 3696070, 4065677, 4279660, 5808110, 7392140, 8131354, 11616220, 16262708, 20328385, 40656770, 81313540]

約数ペア:

[(1, 81313540), (2, 40656770), (4, 20328385), (5, 16262708), (7, 11616220), (10, 8131354), (11, 7392140), (14, 5808110), (19, 4279660), (20, 4065677), (22, 3696070), (28, 2904055), (35, 2323244), (38, 2139830), (44, 1848035), (49, 1659460), (55, 1478428), (70, 1161622), (76, 1069915), (77, 1056020), (95, 855932), (98, 829730), (110, 739214), (133, 611380), (140, 580811), (154, 528010), (190, 427966), (196, 414865), (209, 389060), (220, 369607), (245, 331892), (266, 305690), (308, 264005), (380, 213983), (385, 211204), (397, 204820), (418, 194530), (490, 165946), (532, 152845), (539, 150860), (665, 122276), (770, 105602), (794, 102410), (836, 97265), (931, 87340), (980, 82973), (1045, 77812), (1078, 75430), (1330, 61138), (1463, 55580), (1540, 52801), (1588, 51205), (1862, 43670), (1985, 40964), (2090, 38906), (2156, 37715), (2660, 30569), (2695, 30172), (2779, 29260), (2926, 27790), (3724, 21835), (3970, 20482), (4180, 19453), (4367, 18620), (4655, 17468), (5390, 15086), (5558, 14630), (5852, 13895), (7315, 11116), (7543, 10780), (7940, 10241), (8734, 9310)]