19876480

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{2389}}^1$

素因数の和:2421

約数の個数: 64

約数和(自身を含む): 51193800

約数和(自身を除く): 31317320

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 260, 320, 416, 520, 640, 832, 1040, 1664, 2080, 2389, 4160, 4778, 8320, 9556, 11945, 19112, 23890, 31057, 38224, 47780, 62114, 76448, 95560, 124228, 152896, 155285, 191120, 248456, 305792, 310570, 382240, 496912, 621140, 764480, 993824, 1242280, 1528960, 1987648, 2484560, 3975296, 4969120, 9938240, 19876480]

約数ペア:

[(1, 19876480), (2, 9938240), (4, 4969120), (5, 3975296), (8, 2484560), (10, 1987648), (13, 1528960), (16, 1242280), (20, 993824), (26, 764480), (32, 621140), (40, 496912), (52, 382240), (64, 310570), (65, 305792), (80, 248456), (104, 191120), (128, 155285), (130, 152896), (160, 124228), (208, 95560), (260, 76448), (320, 62114), (416, 47780), (520, 38224), (640, 31057), (832, 23890), (1040, 19112), (1664, 11945), (2080, 9556), (2389, 8320), (4160, 4778)]