19310980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{257}}^1$

素因数の和:313

約数の個数: 72

約数和(自身を含む): 46573128

約数和(自身を除く): 27262148

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 170, 221, 257, 260, 289, 340, 442, 514, 578, 884, 1028, 1105, 1156, 1285, 1445, 2210, 2570, 2890, 3341, 3757, 4369, 4420, 5140, 5780, 6682, 7514, 8738, 13364, 15028, 16705, 17476, 18785, 21845, 33410, 37570, 43690, 56797, 66820, 74273, 75140, 87380, 113594, 148546, 227188, 283985, 297092, 371365, 567970, 742730, 965549, 1135940, 1485460, 1931098, 3862196, 4827745, 9655490, 19310980]

約数ペア:

[(1, 19310980), (2, 9655490), (4, 4827745), (5, 3862196), (10, 1931098), (13, 1485460), (17, 1135940), (20, 965549), (26, 742730), (34, 567970), (52, 371365), (65, 297092), (68, 283985), (85, 227188), (130, 148546), (170, 113594), (221, 87380), (257, 75140), (260, 74273), (289, 66820), (340, 56797), (442, 43690), (514, 37570), (578, 33410), (884, 21845), (1028, 18785), (1105, 17476), (1156, 16705), (1285, 15028), (1445, 13364), (2210, 8738), (2570, 7514), (2890, 6682), (3341, 5780), (3757, 5140), (4369, 4420)]