19980120

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{131}}^1$

素因数の和:217

約数の個数: 128

約数和(自身を含む): 63866880

約数和(自身を除く): 43886760

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 31, 40, 41, 60, 62, 82, 93, 120, 123, 124, 131, 155, 164, 186, 205, 246, 248, 262, 310, 328, 372, 393, 410, 465, 492, 524, 615, 620, 655, 744, 786, 820, 930, 984, 1048, 1230, 1240, 1271, 1310, 1572, 1640, 1860, 1965, 2460, 2542, 2620, 3144, 3720, 3813, 3930, 4061, 4920, 5084, 5240, 5371, 6355, 7626, 7860, 8122, 10168, 10742, 12183, 12710, 15252, 15720, 16113, 16244, 19065, 20305, 21484, 24366, 25420, 26855, 30504, 32226, 32488, 38130, 40610, 42968, 48732, 50840, 53710, 60915, 64452, 76260, 80565, 81220, 97464, 107420, 121830, 128904, 152520, 161130, 162440, 166501, 214840, 243660, 322260, 333002, 487320, 499503, 644520, 666004, 832505, 999006, 1332008, 1665010, 1998012, 2497515, 3330020, 3996024, 4995030, 6660040, 9990060, 19980120]

約数ペア:

[(1, 19980120), (2, 9990060), (3, 6660040), (4, 4995030), (5, 3996024), (6, 3330020), (8, 2497515), (10, 1998012), (12, 1665010), (15, 1332008), (20, 999006), (24, 832505), (30, 666004), (31, 644520), (40, 499503), (41, 487320), (60, 333002), (62, 322260), (82, 243660), (93, 214840), (120, 166501), (123, 162440), (124, 161130), (131, 152520), (155, 128904), (164, 121830), (186, 107420), (205, 97464), (246, 81220), (248, 80565), (262, 76260), (310, 64452), (328, 60915), (372, 53710), (393, 50840), (410, 48732), (465, 42968), (492, 40610), (524, 38130), (615, 32488), (620, 32226), (655, 30504), (744, 26855), (786, 25420), (820, 24366), (930, 21484), (984, 20305), (1048, 19065), (1230, 16244), (1240, 16113), (1271, 15720), (1310, 15252), (1572, 12710), (1640, 12183), (1860, 10742), (1965, 10168), (2460, 8122), (2542, 7860), (2620, 7626), (3144, 6355), (3720, 5371), (3813, 5240), (3930, 5084), (4061, 4920)]