18915890

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{379}}^1$

素因数の和:447

約数の個数: 64

約数和(自身を含む): 42024960

約数和(自身を除く): 23109070

約数列:

[1, 2, 5, 7, 10, 14, 23, 31, 35, 46, 62, 70, 115, 155, 161, 217, 230, 310, 322, 379, 434, 713, 758, 805, 1085, 1426, 1610, 1895, 2170, 2653, 3565, 3790, 4991, 5306, 7130, 8717, 9982, 11749, 13265, 17434, 23498, 24955, 26530, 43585, 49910, 58745, 61019, 82243, 87170, 117490, 122038, 164486, 270227, 305095, 411215, 540454, 610190, 822430, 1351135, 1891589, 2702270, 3783178, 9457945, 18915890]

約数ペア:

[(1, 18915890), (2, 9457945), (5, 3783178), (7, 2702270), (10, 1891589), (14, 1351135), (23, 822430), (31, 610190), (35, 540454), (46, 411215), (62, 305095), (70, 270227), (115, 164486), (155, 122038), (161, 117490), (217, 87170), (230, 82243), (310, 61019), (322, 58745), (379, 49910), (434, 43585), (713, 26530), (758, 24955), (805, 23498), (1085, 17434), (1426, 13265), (1610, 11749), (1895, 9982), (2170, 8717), (2653, 7130), (3565, 5306), (3790, 4991)]